Improvement in securing close joints in pitmen



A. HARROUN.

Improvement in Securing Close-Joints in Pi tmans.

N0.128,959. PatentedJu|y1 6 ,1872.

NM. Murmur/11201001116 m m (ossamlzs mbczss.)

' UNITED STATES PATENT OFFICE.

ALEXANDER HARROUN, OF PERRYVILLE, NEW YORK.

IMPROVEMENT IN SECURING CLOSE JOINTS IN PITMEN.

Specification forming part of Letters Patent No. 128,959, dated July 16, 1872.

Specification describing certain Improvements in the Mode of Securing Close Joints in the connections between the crank-pin and cutter-bar of mowing-machines and reapers, and for other purposes, invented by ALEX- ANDER HARROUN, of Perryville, in the county of Madison and State of New York.

My invention is designed to secure close joints or connections between the crank-pin and cutter-bar of mowers and reapers, and is designed to be used in other places hereafter described.

Figure 1 of the drawing gives a side view of my invention, substantially as it would be used in a mower and reaper. The letter a refers to the crank-wheel. The letter (Z refers to the pitman. The letter 0 refers to the cutter-bar.

First, I place a closely-fittin g shell or thimble upon the crank-pin, which covers all that part of the pin liable to be worn out of its original shape by its action upon the pitman. This shell is stationary upon the pin except when turned for the purpose of bringing a new side to bear against the pitman. By turning the shell upon the pin at suitable times, the shell, as well as the pin, is kept in a circular shape, and being thus kept, the box around the shell can be held close against it without causing undue friction during any part of a revolution by the crank-wheel.

Fig. 2 of the drawing gives a side view of this shell, and Fig. 3 gives an end view.

The letter b, Fig. 1, refers to the shell as it would be used in a mower or reaper. The shell may be made of one piece of material, or it may be made of parts, as indicated by Fig. 3. V

Second, I place a similar shell upon the pitman-pin, and for the same purpose-that is, for the protection of the pin. This shell, like the other, is stationary upon the pin except when turned for the purpose of bringing new sides to bear against the sides of the aperture or place in which it acts. The reason for turning it upon the pin is the same as that which makes it useful to turn the shell which is used upon the crank-pin.

Fig. 8 of the drawing gives a side view of the shell used upon the pitman-pin, and Fig. 9 gives an end view. The letter f, of Fig. 1, refers to the shell while in its place in the eye of the cutter-bar head.

Third, I also use an adjustable or sliding box on one side of the eye of the cutter-bar head, for the purpose of providing for that which is worn away by the action of the pitman-pin in the eye. This box is held against the pitman-pin by a screw, or by two of them, if found necessary, and it is held in place by a screw which enters it and draws it firmly against the cutter-bar head, or against those screws which are used for urging the box forward against the pin.

Fig-6 of the drawing gives a rear view of this box with a screw inserted. Fig. 7 gives an end view with a screw inserted. The .letter g of Fig. 1 refers to the box in the cutterbar head. The letter 9, Fig. 5, refers to the same.

If the pin by which the pitman connects with the cutter-bar is attached to the cutterbar instead of being attached to the pitman, the box is inserted in the eye of the pitman instead of being used in the eye of the cutterbar head. The letter 0 of Fig. 1 refers .to a device for giving motion to the shell upon the crank-pin.

I do not claim an adjustable or variable eye for cutter-bar heads for mowers and reapers, as such have been made before.

I claim as my invention- 1. The shell 12, when constructed and used substantially as and for the purpose hereinbefore described.

2. The shell f, when constructed and used substantially as and for the purpose set forth.

ALEXANDER HARRQUN.

Witnesses: DANIEL PINOKNEY, WESLEY F. TOOKE. 

